﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Basic
{
    class Program
    {
        static void Main(string[] args)
        {
            Parent p1 = new Parent();
            Parent p2 = new Child();
            Child c1 = new Child();
            p1.sayHide();
            p2.sayHide();
            c1.sayHide();
            Console.ReadLine();

        }
    }
}
